Harness racing sophomores battled in the finals of the Ontario-sired Spring Series, worth a combined $189,100, at Woodbine Mohawk Park on Saturday (Apr. 27). Convoy Hall (Muscle Mass) remained undefeated in the $43,600 division for trotting males. The gelding made it six-for-six in his debut season as he completed a give-and-go on the backstretch and